Normally people shed 50 to 100 hairs a day, which is considered normal. Nothing to worry if you are losing 100 hairs a day, but if the count increases then it is definitely an alarming signal. Losing hair in juvenescence means that there is deficiency of essential proteins and nutrients in the diet or can be due to some other reasons such as using chemicals to look good like hair gels and hair colors, medications and treating hairs with chemotherapy etc. Hair loss can be characterized in many scalp condition such as hair detritus (hair stops to grow anymore), thinning of hair, partial or full baldness, alopecia etc.
Hair is made of protein called "Keratin". Hair has 2 parts i.e hair shaft (which is visible on the scalp) & root (which is underneath the scalp) which is responsible for the growth of hair.
Here are some major causes for hair loss:
This is very common cause for hair loss and practically there is lack of evidence to substantiate this. So, if your organic parents, closed relatives or other family members have baldness or thin hair, you can be assured for your hair loss or fall
Health is an essential part of our organic system. As other cells of our body need proper care, hair cells in our scalp also needs proper nourishment and nutrition. Deficiency of vitamins, minerals and other nutrients from diet can be one of the reasons of hair loss/baldness
High fever for long period and other viral diseases like thyroid problems, scalp infections, alopecia areata, and other skin disorders are said to be some of the contributing factor to hair loss
Hair loss can be caused by drugs and treatments used to treat severe conditions like arthritis, depression, cancer, heart problems, high blood pressure which are harmful for your scalp and hair. Normally cancer patients subjected to radiation and chemotherapy are much susceptible to the hair loss or rapid thinning of hair
Hormonal imbalances and changes can cause temporary hair fall/loss. Changes could be due to pregnancy, childbirth, onset of menopause, cessation of birth control pills. Pregnancy and giving child birth is one of the major causes of hair loss due to mineral deficiencies or other loses.
Stress is root for every disease, so it also has subversive effects which led to hair loss. Like other body cells, hair cells also need pause, relaxation and refreshment and your stress can be a major reason for non responsive degrowth of hairs. Also sudden or excessive weight loss, death in the family or a a high fever can be a reason.
Sometimes mental illness causes people to have an irresistible exhort to pull out their hair which often leaves uneven bald spots on the head.
Hair loss can also occur due to tight hairstyles such as cornrows and pigtails. Also some chemically treated cosmetics led to hair loss. These include hair gels, hair straightening chemicals, hair colors, shampoos etc.